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<SEC-DOCUMENT>0001169232-05-004237.txt : 20050818
<SEC-HEADER>0001169232-05-004237.hdr.sgml : 20050818
<ACCEPTANCE-DATETIME>20050818095352
ACCESSION NUMBER:		0001169232-05-004237
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20050728
FILED AS OF DATE:		20050818
DATE AS OF CHANGE:		20050818

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AEROGEN INC
		CENTRAL INDEX KEY:			0001039160
		STANDARD INDUSTRIAL CLASSIFICATION:	SURGICAL & MEDICAL INSTRUMENTS & APPARATUS [3841]
		IRS NUMBER:				330488580
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2071 STIERLIN COURT
		CITY:			MOUNTAIN VIEW
		STATE:			CA
		ZIP:			94043
		BUSINESS PHONE:		650 864-7300

	MAIL ADDRESS:	
		STREET 1:		2071 STIERLIN COURT
		CITY:			MOUNTAIN VIEW
		STATE:			CA
		ZIP:			94043

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PROMED OFFSHORE FUND II, LTD
		CENTRAL INDEX KEY:			0001328780

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-31913
		FILM NUMBER:		051034767

	BUSINESS ADDRESS:	
		STREET 1:		125 CAMBRIDGEPARK DRIVE
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02140
		BUSINESS PHONE:		617-441-8800

	MAIL ADDRESS:	
		STREET 1:		125 CAMBRIDGEPARK DRIVE
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02140

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PROMED MANAGEMENT INC
		CENTRAL INDEX KEY:			0001101088
		STATE OF INCORPORATION:			MA

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-31913
		FILM NUMBER:		051034768

	BUSINESS ADDRESS:	
		STREET 1:		C/O MUSKET RESEARCH ASSOCIATES INC
		STREET 2:		125 CAMBRIDGEPARK DRIVE
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02140

	FORMER NAME:	
		FORMER CONFORMED NAME:	PROMED MANAGEMENT L L C
		DATE OF NAME CHANGE:	19991215

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PROMED OFFSHORE FUND, LTD
		CENTRAL INDEX KEY:			0001328779

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-31913
		FILM NUMBER:		051034769

	BUSINESS ADDRESS:	
		STREET 1:		125 CAMBRIDGEPARK DRIVE
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02140
		BUSINESS PHONE:		617-441-8800

	MAIL ADDRESS:	
		STREET 1:		125 CAMBRIDGEPARK DRIVE
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02140

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PROMED PARTNERS II LP
		CENTRAL INDEX KEY:			0001144358

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-31913
		FILM NUMBER:		051034770

	BUSINESS ADDRESS:	
		STREET 1:		125 CAMBRIDGEPARK DRIVE
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02140
		BUSINESS PHONE:		6174418800

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PROMED PARTNERS L P
		CENTRAL INDEX KEY:			0001011552

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-31913
		FILM NUMBER:		051034771

	BUSINESS ADDRESS:	
		STREET 1:		125 CAMBRIDGEPARK DR
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02104
		BUSINESS PHONE:		6174418800

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PROMED ASSET MANAGEMENT, LLC
		CENTRAL INDEX KEY:			0001328778

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-31913
		FILM NUMBER:		051034772

	BUSINESS ADDRESS:	
		STREET 1:		125 CAMBRIDGEPARK DRIVE
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02140
		BUSINESS PHONE:		617-441-8800

	MAIL ADDRESS:	
		STREET 1:		125 CAMBRIDGEPARK DRIVE
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02140

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			KUROKAWA BARRY
		CENTRAL INDEX KEY:			0001329753

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-31913
		FILM NUMBER:		051034773

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		617-441-8800

	MAIL ADDRESS:	
		STREET 1:		C/O PROMED PARTNERS, L.P.
		STREET 2:		125 CAMBRIDGEPARK DRIVE
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02140

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Musket David B
		CENTRAL INDEX KEY:			0001310611

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-31913
		FILM NUMBER:		051034774

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		(650) 614-4100

	MAIL ADDRESS:	
		STREET 1:		C/O CONOR MEDSYSTEMS, INC.
		STREET 2:		1003 HAMILTON COURT
		CITY:			MENLO PARK
		STATE:			CA
		ZIP:			94025
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>d05-65010_ex.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-07-28</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001039160</issuerCik>
        <issuerName>AEROGEN INC</issuerName>
        <issuerTradingSymbol>AEGN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001310611</rptOwnerCik>
            <rptOwnerName>Musket David B</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>125 CAMBRIDGEPARK DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CAMBRIDGE</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02140</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001329753</rptOwnerCik>
            <rptOwnerName>KUROKAWA BARRY</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O PROMED PARTNERS, L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>125 CAMBRIDGEPARK DRIVE</rptOwnerStreet2>
            <rptOwnerCity>CAMBRIDGE</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02140</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>Joint Filer</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001328778</rptOwnerCik>
            <rptOwnerName>PROMED ASSET MANAGEMENT, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>125 CAMBRIDGEPARK DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CAMBRIDGE</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02140</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>Joint Filer</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001011552</rptOwnerCik>
            <rptOwnerName>PROMED PARTNERS L P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>125 CAMBRIDGEPARK DR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>125 CAMBRIDGEPARK DR</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02104</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>Joint Filer</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001144358</rptOwnerCik>
            <rptOwnerName>PROMED PARTNERS II LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>125 CAMBRIDGEPARK DR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CAMBRIDGE</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02104</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>Joint Filer</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001101088</rptOwnerCik>
            <rptOwnerName>PROMED MANAGEMENT INC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>125 CAMBRIDGEPARK DR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CAMBRIDGE</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02104</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>Joint Filer</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001328779</rptOwnerCik>
            <rptOwnerName>PROMED OFFSHORE FUND, LTD</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>125 CAMBRIDGEPARK DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CAMBRIDGE</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02140</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>Joint Filer</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001328780</rptOwnerCik>
            <rptOwnerName>PROMED OFFSHORE FUND II, LTD</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>125 CAMBRIDGEPARK DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CAMBRIDGE</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02140</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>Joint Filer</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2005-07-28</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>33700</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.6474</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>851434</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The reported sale of 33,700 shares of the Issuer was made on behalf of the accounts of ProMed Partners, L.P., whose general
partner is ProMed Asset Management, L.L.C. (&quot;ProMed Asset Management&quot;), which is controlled by David B. Musket and Barry
Kurokawa (sold 6,000 shares and which as of the date of this Form 4, owns 449,480 shares of the Issuer); ProMed Partners II,
L.P., whose general partner is also ProMed Asset Management (sold 1,650 shares and which as of the date of this Form 4, owns
82,336 shares of the Issuer); ProMed Offshore II Fund, Ltd., the Investment Manager of which is ProMed Management, Inc.
(&quot;ProMed Management&quot;) (sold 25,050 shares and which as of the date of this Form 4, owns 124,579 shares of the Issuer); and
ProMed Offshore Fund, Ltd., whose investment manager is also ProMed Management (sold 1,000 shares and which as of the date
of this Form 4, owns 72,564 shares of the Issuer). ProMed Management is controlled by David B. Musket and Barry Kurokawa.</footnote>
        <footnote id="F2">The remainder of the reported amount of securities beneficially owned following the reported transaction may be deemed to be
beneficially owned as follows: (A) 120,942 shares of the Issuer owned directly by David B. Muskat; and (B) 1,533 shares of
the Issuer owned directly by Barry Kurokawa. Each Reporting Person disclaims beneficial ownership of the reported securities
except to the extent of his or its pecuniary interest therein, and this report shall not be deemed an admission that such
Reporting Person is the beneficial owner of the securities for purposes of Section 16 of the Securities Exchange Act of
1934, as amended, or for any other purpose.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>David B. Musket</signatureName>
        <signatureDate>2005-08-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99
<SEQUENCE>2
<FILENAME>d65010_ex99.htm
<DESCRIPTION>JOINT FILING INFORMATION
<TEXT>
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<!-- MARKER FORMAT-SHEET="Head Right-TNR" FSL="Workstation" -->
<P ALIGN=RIGHT><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Exhibit 99 </FONT></P>


        <p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'>&nbsp;&nbsp;<u><b><font size=2>Joint Filing Information</font></b></u></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;&nbsp;Name: Barry Kurokawa</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="620" style=' border-collapse:collapse'>
      <tr>
         <td width="63" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Address: </font></p> </td>
         <td width="575" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>125 Cambridgepark Drive</font></p> </td>

</tr>
     <tr>
         <td width="63" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
         <td width="575" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Cambridge, MA 02140</font></p> </td>

</tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;&nbsp;Designated Filer: David B. Musket</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="450" style=' border-collapse:collapse'>
      <tr>
         <td width="307" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Issuer and Ticker Symbol:

Aerogen&nbsp;Inc.</font></p> </td>
         <td width="75" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font SIZE=2>AEGN</font></p> </td> </tr>
     <tr>
         <td width="307" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
         <td width="109" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td> </tr>
     <tr>
         <td width="95" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Date of Event Requiring Filing:</font></p>

</td>
         <td width="189" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>July 28, 2005</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="292" style=' border-collapse:collapse'>
      <tr >
         <td width="96" valign=top >
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>&nbsp;&nbsp;Signature:</font></p> </td>
         <td width="132" valign=top >
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Barry Kurokawa</font></p> </td>
         <td  width="64">
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></td> </tr>
     <tr >
         <td  width="96">
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></td>
         <td  colspan="2" valign=top >
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>By:  /s/Barry Kurokawa</font></p> </td>

</tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;&nbsp;Date: August 17, 2005</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'>
</p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>
<br>
<HR noshade align="center" width="100%" size="2">

<p style='page-break-before:always'></p>


<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<P ALIGN=LEFT><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;&nbsp;<u><b>Joint Filing
Information</b></u> </FONT></P>


<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;&nbsp;Name: ProMed Asset Management, L.L.C.</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="600" style=' border-collapse:collapse'>
      <tr>
         <td width="63" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Address: </font></p> </td>
         <td width="575" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>125 Cambridgepark Drive</font></p> </td>

</tr>
     <tr>
         <td width="63" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
         <td width="575" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Cambridge, MA 02140</font></p> </td>

</tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt; margin-left:0.75in;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;&nbsp;Designated Filer: David B. Musket</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="400" style=' border-collapse:collapse'>
      <tr>
        <td width="327" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Issuer and Ticker Symbol: Aerogen

Inc.</font></p> </td>
         <td width="189" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font SIZE=2>AEGN</font></p> </td> </tr>
     <tr>
         <td width="327" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
         <td width="189" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td> </tr>
     <tr>
         <td width="327" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>&nbsp;Date of Event Requiring Filing:</font></p>

</td>
         <td width="189" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>July 28, 2005</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="364" style=' border-collapse:collapse'>
      <tr>
         <td width="96" valign=top >
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>&nbsp;&nbsp;Signature:</font></p> </td>
         <td width="268" valign=top >
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>ProMed Asset Management,

L.L.C.</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="196" style=' margin-left:1.0in;border-collapse:collapse'>
      <tr>
         <td width="196" valign=top >
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>By: /s/David B. Musket</font></p> </td>

</tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;&nbsp;Date: August 17, 2005</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'>
</p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>
<br>
<HR noshade align="center" width="100%" size="2">
<p style='page-break-before:always'></p>



<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'>&nbsp;&nbsp;<u><b><font size=2>Joint Filing Information</font></b></u></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;&nbsp;Name: ProMed Partners, L.P.</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="600" style=' border-collapse:collapse'>
      <tr>
         <td width="63" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Address: </font></p> </td>
         <td width="575" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>125 Cambridgepark Drive</font></p> </td>

</tr>
     <tr>
         <td width="63" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
         <td width="575" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Cambridge, MA 02140</font></p> </td>

</tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;&nbsp;Designated Filer: David B. Musket</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="400" style=' border-collapse:collapse'>
      <tr>
         <td width="327" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Issuer and Ticker Symbol: Aerogen

Inc.</font></p> </td>
         <td width="189" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font SIZE=2>AEGN</font></p> </td> </tr>
     <tr>
         <td width="327" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
         <td width="189" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td> </tr>
     <tr>
         <td width="327" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Date of Event Requiring Filing:</font></p>

</td>
         <td width="189" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>July 28, 2005</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="284" style=' border-collapse:collapse'>
      <tr>
         <td width="96" valign=top >
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>&nbsp;&nbsp;Signature:</font></p> </td>
         <td width="188" valign=top >
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>ProMed Partners, L.P.</font></p> </td>

</tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:1in;text-align:left;'><font size=2>By: ProMed Asset Management, L.L.C., its general

partner</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="204" style=' margin-left:1.0in;border-collapse:collapse'>
      <tr>
         <td width="204" valign=top >
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>By: /s/ David B. Musket</font></p> </td>

</tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;&nbsp;Date: August 17, 2005</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'>
</p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>
<br>
<HR noshade align="center" width="100%" size="2">
<p style='page-break-before:always'></p>



<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'>&nbsp;&nbsp;<u><b><font size=2>Joint Filing Information</font></b></u></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;&nbsp;Name: ProMed Partners II, L.P.</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="600" style=' border-collapse:collapse'>
      <tr>
         <td width="63" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Address: </font></p> </td>
         <td width="575" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>125 Cambridgepark Drive</font></p> </td>

</tr>
     <tr>
         <td width="63" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
         <td width="575" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Cambridge, MA 02140</font></p> </td>

</tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;&nbsp;Designated Filer: David B. Musket</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="400" style=' border-collapse:collapse'>
      <tr>
         <td width="327" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Issuer and Ticker Symbol: Aerogen

Inc.</font></p> </td>
         <td width="189" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font SIZE=2>AEGN</font></p> </td> </tr>
     <tr>
         <td width="327" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
         <td width="189" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td> </tr>
     <tr>
         <td width="327" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Date of Event Requiring Filing:</font></p>

</td>
         <td width="189" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>July 28, 2005</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="308" style=' border-collapse:collapse'>
      <tr>
         <td width="96" valign=top >
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>&nbsp;&nbsp;Signature:</font></p> </td>
         <td width="212" valign=top >
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>ProMed Partners II, L.P.</font></p> </td>

</tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt; text-indent:1in;text-align:left;'><font size=2>By: ProMed Asset Management, L.L.C., its general

partner</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="204" style=' margin-left:1.0in;border-collapse:collapse'>
      <tr>
         <td width="204" valign=top >
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>By: /s/ David B. Musket</font></p> </td>

</tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;&nbsp;Date: August 17, 2005</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'>
</p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>
<br>
<HR noshade align="center" width="100%" size="2">
<p style='page-break-before:always'></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'>&nbsp;&nbsp;<u><b><font size=2>Joint Filing Information</font></b></u></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;&nbsp;Name: ProMed Management, Inc.</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="600" style=' border-collapse:collapse'>
      <tr>
         <td width="63" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Address: </font></p> </td>
         <td width="575" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>125 Cambridgepark Drive</font></p> </td>

</tr>
     <tr>
         <td width="63" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
         <td width="575" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Cambridge, MA 02140</font></p> </td>

</tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;&nbsp;Designated Filer: David B. Musket</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="400" style=' border-collapse:collapse'>
      <tr>
         <td width="327" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Issuer and Ticker Symbol: Aerogen

Inc.</font></p> </td>
         <td width="189" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font SIZE=2>AEGN</font></p> </td> </tr>
     <tr>
         <td width="327" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
         <td width="189" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td> </tr>
     <tr>
         <td width="327" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>&nbsp;Date of Event Requiring Filing:</font></p>

</td>
         <td width="189" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>July 28, 2005</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="300" style=' border-collapse:collapse'>
      <tr>
         <td width="96" valign=top >
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>&nbsp;&nbsp;Signature:</font></p> </td>
         <td width="204" valign=top >
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>ProMed Management, Inc.</font></p> </td>

</tr>
     <tr >
         <td  width="96">
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></td>
         <td width="204" valign=top >
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>By: /s/ David B. Musket</font></p> </td>

</tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;&nbsp;Date: August 17, 2005</font></p>


<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'>
</p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>
<br>
<HR noshade align="center" width="100%" size="2">
<p style='page-break-before:always'></p>
<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'>&nbsp;&nbsp;<u><b><font size=2>Joint Filing Information</font></b></u></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;&nbsp;Name: ProMed Offshore Fund, Ltd.</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;&nbsp;Address: [TO BE INSERTED]</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;&nbsp;Designated Filer: David B. Musket</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="400" style=' border-collapse:collapse'>
      <tr>
         <td width="327" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Issuer and Ticker Symbol: Aerogen

Inc.</font></p> </td>
         <td width="189" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font SIZE=2>AEGN</font></p> </td> </tr>
     <tr>
         <td width="327" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1></font></p> </td>
         <td width="189" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1></font></p> </td> </tr>
     <tr>
         <td width="327" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Date of Event Requiring Filing:</font></p>
</td>
         <td width="189" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>July 28, 2005</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="428" style=' border-collapse:collapse'>
      <tr >
         <td width="96" valign=top >
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>&nbsp;&nbsp;Signature:</font></p> </td>
         <td width="228" valign=top >
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>ProMed Offshore Fund, Ltd.</font></p> </td>
         <td  width="104">
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></td> </tr>
     <tr >
         <td  width="96">
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></td>
         <td  colspan="2" valign=top >
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>By: /s/ David B. Musket, its

[Director]</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;&nbsp;Date: August 17, 2005</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'>
</p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>
<br>
<HR noshade align="center" width="100%" size="2">
<p style='page-break-before:always'></p>


<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'>&nbsp;&nbsp;<u><b><font size=2>Joint Filing Information</font></b></u></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;&nbsp;Name: ProMed Offshore Fund II, Ltd.</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;&nbsp;Address: [TO BE INSERTED]</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;&nbsp;Designated Filer: David B. Musket</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="400" style=' border-collapse:collapse'>
      <tr>
         <td width="327" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Issuer and Ticker Symbol: Aerogen

Inc.</font></p> </td>
         <td width="189" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font SIZE=2>AEGN</font></p> </td> </tr>
     <tr>
         <td width="327" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td>
         <td width="189" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></p> </td> </tr>
     <tr>
         <td width="327" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>Date of Event Requiring Filing:</font></p>

</td>
         <td width="189" valign=top style='padding:0in 5.4pt 0in 5.4pt'>
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>July 28, 2005</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>


<table border="0" cellspacing=0 cellpadding=0 width="428" style=' border-collapse:collapse'>
      <tr >
         <td width="96" valign=top >
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>&nbsp;&nbsp;&nbsp;Signature:</font></p> </td>
         <td width="252" valign=top >
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>ProMed Offshore Fund II, Ltd.</font></p>

</td>
         <td  width="80">
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></td> </tr>
     <tr >
         <td  width="96">
            <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=1>&nbsp;</font></td>
         <td  colspan="2" valign=top >
             <p style='margin-left:0pt;text-indent:0pt;text-align:left;margin-top:0pt;margin-bottom:0pt'><font size=2>By: /s/ David B. Musket, its

[Director]</font></p> </td> </tr></table>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;&nbsp;&nbsp;Date: August 17, 2005</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>

<p style=' margin-bottom:0pt; margin-top:0pt;text-align:left;'><font size=2>&nbsp;</font></p>
<HR noshade align="center" width="100%" size="2">

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